Distribution Patterns of Raptors in Relation to Density of Meadow Voles

Abstract

Densities of overwintering Red-tailed Hawks (Buteo jamaicensis) and Rough-legged Hawks (Buteo lagopus) were examined in relation to densities of meadow voles (Microtus pennsylvanicus) on six habitat types. Generally, densities of both raptor species were greater in habitats that had higher densities of meadow voles. However, not all habitats with high numbers of voles had high numbers of the raptors. The amount and distribution of cover also appeared to influence the distribution of the raptors. Hence, patches that support high densities of prey may not be profitable foraging sites for predators because other factors may reduce availability of prey.